Casual friends, both straight but curious, decide to spice up their guys' night with a joint and a porn marathon. As the night progresses, they find themselves drawn to each other, their inhibitions fading with each puff. One of them suggests they try something new, and the other eagerly agrees. They start with a hesitant make-out session, exploring each other's bodies with tentative touches. Soon, they're hard and ready, their straight mates' identities shed as they dive into a passionate, bisexual threesome.